The United Nations has declared 2019 the International Year of the Periodic
Table in honor of the 150th anniversary of that chart of the chemical elements.
To celebrate, our friends at
Lawrence Berkeley National Lab launched a video
campaign highlighting scientists and others talking about their favorite elements—shared
on social media with the hashtags
#MyFaveElement and
#IYPT2019. We’re joining in with
this interactive chart of Brookhaven Lab staff’s picks. Click on any blue element below
to learn who liked it and why. Some choices relate directly to our research; some are
personal preferences; and some are just for fun!

1

H

1.008

Hydrogen

2

He

4.0026

Helium

3

Li

6.94

Lithium

4

Be

9.0122

Beryllium

5

B

10.81

Boron

6

C

12.011

Carbon

7

N

14.007

Nitrogen

8

O

15.999

Oxygen

9

F

18.998

Fluorine

10

Ne

20.180

Neon

11

Na

22.990

Sodium

12

Mg

24.305

Magnesium

13

Al

26.982

Aluminium

14

Si

28.085

Silicon

15

P

30.974

Phosphorus

16

S

32.06

Sulfur

17

Cl

35.45

Chlorine

18

Ar

39.948

Argon

19

K

39.098

Potassium

20

Ca

40.078

Calcium

21

Sc

44.956

Scandium

22

Ti

47.867

Titanium

23

V

50.942

Vanadium

24

Cr

51.996

Chromium

25

Mn

54.938

Manganese

26

Fe

55.845

Iron

27

Co

58.933

Cobalt

28

Ni

58.693

Nickel

29

Cu

63.546

Copper

30

Zn

65.38

Zinc

31

Ga

69.723

Gallium

32

Ge

72.630

Germanium

33

As

74.922

Arsenic

34

Se

78.971

Selenium

35

Br

79.904

Bromine

36

Kr

83.798

Krypton

37

Rb

85.468

Rubidium

38

Sr

87.62

Strontium

39

Y

88.906

Yttrium

40

Zr

91.224

Zirconium

41

Nb

92.906

Niobium

42

Mo

95.95

Molybdenum

43

Tc

96.906

Technetium

44

Ru

101.07

Ruthenium

45

Rh

102.91

Rhodium

46

Pd

106.42

Palladium

47

Ag

107.87

Silver

48

Cd

112.41

Cadmium

49

In

114.82

Indium

50

Sn

118.71

Tin

51

Sb

121.76

Antimony

52

Te

127.60

Tellurium

53

I

126.90

Iodine

54

Xe

131.29

Xenon

55

Cs

132.91

Caesium

56

Ba

137.33

Barium

57-71

*

72

Hf

178.49

Hafnium

73

Ta

180.95

Tantalum

74

W

183.84

Tungsten

75

Re

186.21

Rhenium

76

Os

190.23

Osmium

77

Ir

192.22

Iridium

78

Pt

195.08

Platinum

79

Au

196.97

Gold

80

Hg

200.59

Mercury

81

Tl

204.38

Thallium

82

Pb

207.2

Lead

83

Bi

208.98

Bismuth

84

Po

208.98

Polonium

85

At

209.99

Astatine

86

Rn

222.02

Radon

87

Fr

223.02

Francium

88

Ra

226.03

Radium

89-103

**

104

Rf

267.12

Rutherfordium

105

Db

270.13

Dubnium

106

Sg

269.13

Seaborgium

107

Bh

270.13

Bohrium

108

Hs

269.13

Hassium

109

Mt

278.16

Meitnerium

110

Ds

281.17

Darmstadtium

111

Rg

281.17

Roentgenium

112

Cn

285.18

Copernicium

113

Nh

286.18

Nihonium

114

Fl

289.19

Flerovium

115

Mc

289.20

Moscovium

116

Lv

293.20

Livermorium

117

Ts

293.21

Tennessine

118

Og

294.21

Oganesson

*

57

La

138.91

Lanthanum

58

Ce

140.12

Cerium

59

Pr

140.91

Praseodymium

60

Nd

144.24

Neodymium

61

Pm

144.91

Promethium

62

Sm

150.36

Samarium

63

Eu

151.96

Europium

64

Gd

157.25

Gadolinium

65

Tb

158.93

Terbium

66

Dy

162.50

Dysprosium

67

Ho

164.93

Holmium

68

Er

167.26

Erbium

69

Tm

168.93

Thulium

70

Yb

173.05

Ytterbium

71

Lu

174.97

Lutetium

**

89

Ac

227.03

Actinium

90

Th

232.04

Thorium

91

Pa

231.04

Protactinium

92

U

238.03

Uranium

93

Np

237.05

Neptunium

94

Pu

244.06

Plutonium

95

Am

243.06

Americium

96

Cm

247.07

Curium

97

Bk

247.07

Berkelium

98

Cf

251.08

Californium

99

Es

252.08

Einsteinium

100

Fm

257.10

Fermium

101

Md

258.10

Mendelevium

102

No

259.10

Nobelium

103

Lr

262.11

Lawrencium

Click on any highlighted element to learn who considers it a favorite and why.

One of ten national laboratories overseen and primarily funded by the Office of Science of the
U.S. Department of Energy (DOE), Brookhaven National Laboratory conducts research in the physical,
biomedical, and environmental sciences, as well as in energy technologies and national security.
Brookhaven Lab also builds and operates major scientific facilities available to university, industry
and government researchers. Brookhaven is operated and managed for DOE's Office of Science by Brookhaven
Science Associates, a limited-liability company founded by the Research Foundation for the State
University of New York on behalf of Stony Brook University, the largest academic user of Laboratory
facilities, and Battelle, a nonprofit applied science and technology organization.